import pandas as pd

data = pd.read_csv("/datasets/visits_eng.csv", sep="\t")
data['local_time'] = (
    pd.to_datetime(data['date_time'], format='%Y-%m-%dT%H:%M:%S')
    - pd.Timedelta(hours=7)
)
data['too_fast'] = data['time_spent'] < 60
print(data.head())